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All results from a given calculation for H2OH2O (water dimer)

using model chemistry: HF/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at HF/6-31G(2df,p)
 hartrees
Energy at 0K-152.066727
Energy at 298.15K-152.069367
HF Energy-152.066727
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy36.408862
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at HF/6-31G(2df,p)
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 4224 3824 108.07      
2 A' 4137 3746 22.94      
3 A' 4099 3711 181.07      
4 A' 1800 1630 81.04      
5 A' 1772 1605 107.85      
6 A' 361 327 76.92      
7 A' 174 157 147.76      
8 A' 139 126 162.21      
9 A" 4237 3837 89.37      
10 A" 581 526 149.28      
11 A" 142 129 89.46      
12 A" 106 96 94.65      

Unscaled Zero Point Vibrational Energy (zpe) 10885.4 cm-1
Scaled (by 0.9055) Zero Point Vibrational Energy (zpe) 9856.7 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at HF/6-31G(2df,p)
ABC
7.34717 0.20191 0.20186

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.076 0.618 0.000
O2 0.002 1.561 0.000
O3 0.002 -1.446 0.000
H4 0.886 1.881 0.000
H5 -0.501 -1.708 0.752
H6 -0.501 -1.708 -0.752

Atom - Atom Distances (Å)
  H1 O2 O3 H4 H5 H6
H10.94502.06571.50052.51202.5120
O20.94503.00650.94013.39163.3916
O32.06573.00653.44260.94180.9418
H41.50050.94013.44263.92083.9208
H52.51203.39160.94183.92081.5032
H62.51203.39160.94183.92081.5032

picture of water dimer state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H1 O2 H4 105.490 H1 O3 H5 107.290
H1 O3 H6 107.290 O2 H1 O3 173.512
H5 O3 H6 105.885
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.365      
2 O -0.722      
3 O -0.669      
4 H 0.329      
5 H 0.349      
6 H 0.349      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.151 -2.491 0.000 2.495
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -10.931 6.468 0.000
y 6.468 -12.038 0.000
z 0.000 0.000 -11.164
Traceless
 xyz
x 0.671 6.468 0.000
y 6.468 -0.991 0.000
z 0.000 0.000 0.320
Polar
3z2-r20.640
x2-y21.108
xy6.468
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.722 0.246 0.000
y 0.246 2.023 0.000
z 0.000 0.000 1.691


<r2> (average value of r2) Å2
<r2> 55.496
(<r2>)1/2 7.450